CN103033520A - Detection method for surface quality of hot continuous casting billet - Google Patents
Detection method for surface quality of hot continuous casting billet Download PDFInfo
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- CN103033520A CN103033520A CN2012105762483A CN201210576248A CN103033520A CN 103033520 A CN103033520 A CN 103033520A CN 2012105762483 A CN2012105762483 A CN 2012105762483A CN 201210576248 A CN201210576248 A CN 201210576248A CN 103033520 A CN103033520 A CN 103033520A
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Abstract
The invention discloses a detection method for surface quality of a hot continuous casting billet. The method comprises the steps of image acquisition, image data transmission, image data processing and billet surface defect alarm through a detection system for the surface quality of the hot continuous casting billet. The method achieves real-time detection of surface defects of the continuous casting billet in a hot state, and can visually detect the surface defects of the billet and timely alarm by analyzing collected real-time video signals, so that meaningless continuous processing is avoided, the energy consumption is reduced, and the production cost is lowered.
Description
Technical field
The present invention relates to a kind of field of metallurgy billet quality detection method, particularly a kind of hot detecting continuous casting billet surface quality detection method.
Background technology
In the production run of field of metallurgy, the surface quality of strand is one of important indication of slab quality under the condition of high temperature, and the defect property of casting billet surface and degree are to judge whether qualified important evidence of strand.Because the heat of continuous casting billet send temperature to reach more than 900 ℃, therefore can't with the naked eye directly check its surface quality more can't check its inherent quality.
Fast-developing and application along with the hot feed technique of continuous casting billet hot charging, for avoiding the skimble-skamble continuation processing of useless continuous casting billet, guarantee normal rhythm of production, the heat of realization high-quality continuous casting billet is sent hot rolling and reduced production costs, and is also more aobvious urgent to the requirement that the continuous casting billet surface imperfection detects online.
The online measuring technique of surface quality of continuously cast slab is subject to the great attention of each enterprise and scientific research institutions under the condition of high temperature, and all in competitively researching and developing.At present, the detection technique of continuous casting billet surface imperfection mainly contains EDDY CURRENT and nondestructive examination detection etc. under the condition of high temperature.Wherein, the eddy current testing device in the eddy detection technology mainly is comprised of high-temperature probe, eddy current flaw detec, mechanical scanner and testing result pen recorder.Slow owing to this device reaction, install complicated and differentiate the reasons such as accuracy rate is low, so have no the successful Application case.And nondestructive examination to detect be first along the horizontal surface distance of scanning high temperature strand on the Casting speed direction, measure on the strand traffic direction and the two-dimensional lattice of distance in a lateral direction.Two-dimensional lattice with distance is converted to the distance dot matrix X-Y scheme again, and at last X-Y scheme is carried out image and process, thus the form of identified surface defective.This device successfully is not used for Practical Project because of factors such as system reliability and accuracys rate yet.
Summary of the invention
Technical matters to be solved by this invention provides a kind of for existing issue, can detect intuitively the defective of billet surface and the hot detecting continuous casting billet surface quality detection method of in time reporting to the police.
In order to solve the problems of the technologies described above, the technical solution used in the present invention is:
A kind of hot detecting continuous casting billet surface quality detection method, the step of this detection method is as follows:
1) be equipped with in above hot continuous casting steel billet, installing the technical grade video camera the video camera protective jacket and in the light source protective jacket of light filling equipment is housed, described light filling equipment is aimed at billet surface, utilize highlighted light source to carry out light filling, when steel billet passes through surveyed area, camera is taken continuously, finishes image acquisition;
2) fiber optic and optical cable transmission the fiber optic to indoor machine in of the picture signal after gathering in field box restores into video electrical signal to industrial computer, finishes the transmission of picture signal;
3) described industrial computer carries out the processing of filtering Reduction Analysis to image, by the texture analysis algorithm billet surface image is processed.When casting billet surface had the crack, described crack showed as an elongated darker regions in image; When casting billet surface had pit, described pit showed as the irregular darker regions of a block edge at image; Image after algorithm process, crack and pit show as white portion;
4) with step 2) the real-time video picture of transmission and step 3) process after image result be presented on the display;
5) when computer processing system found that casting billet surface has defective, the defective of billet surface just can be distinguished by system, and according to travelling speed and the detection time of steel billet, system can determine the position of defective again, and warning device sends sound and light alarm automatically.
The invention solves the difficult problem in hot lower real-time detection continuous casting steel billet surface imperfection, analyze by the vision signal to Real-time Collection, the defective that can detect intuitively billet surface is also in time reported to the police, thereby avoided skimble-skamble continuation processing, reduce energy consumption, reduced production cost.
Description of drawings
Fig. 1 is the structural representation of hot detecting continuous casting billet surface quality detection system;
Fig. 2 is the image that industrial camera gathers;
Fig. 3 is the image that industrial camera gathers;
Fig. 4 is the video image after processing;
Fig. 5 is the video image after processing.
Embodiment
As shown in Figure 1, hot detecting continuous casting billet surface quality detection system comprises: be installed in technical grade video camera in the video camera protective jacket 1, be installed in light filling equipment, field box 3, indoor machine 4, display 5, industrial computer 6, warning device 7 in the light source protective jacket 2; It is characterized in that: in be equipped with the technical grade video camera video camera protective jacket 1 and in light filling equipment is housed light source protective jacket 2 be electrically connected with field box 3 respectively, indoor machine 4 is electrically connected with field box 3, industrial computer 6 is electrically connected with indoor machine 4, and display 5 and warning device 7 are electrically connected with industrial computer 6 respectively;
Video camera protective jacket 1 is the water-cooling air-sealing type safeguard structure, and heat eliminating medium is the chilled water of 0.20～0.4MPa, and cooling water inlet Wen Du＜=45 ℃ are connected with chilled water in this safeguard structure interlayer, is used for preventing excess Temperature in the protective jacket, guarantees the video camera normal operation.The protective jacket front end is high temperature resistant window, and high temperature resistant window front end adopts pressurized air to form air curtain and prevents the window dust stratification, and is clear to guarantee video camera imaging, and compressed air inlet pressure is 0.40～0.6MPa, enter a mouthful Wen Du＜=35 ℃.The compressed-air actuated purging of protective jacket 1 front end has been guaranteed the normal working environment of video camera.For guaranteeing the normal operation of light filling equipment, light source protective jacket 2 is similarly the water-cooling air-sealing type structure, be connected with chilled water in this safeguard structure interlayer, with chilled water light source protective jacket 2 cooled off, before high temperature resistant window, form air curtain with pressurized air and prevent the window dust stratification.Compressed air inlet pressure is 0.40～0.6MPa, enter a mouthful Wen Du＜=35 ℃.The intake pressure of chilled water is 0.20～0.4MPa, enter a mouthful Wen Du＜=45 ℃.
Be provided with communication apparatus for video signal transmission in the field box 3, the power control unit of steady operation power supply is provided for technical grade video camera and communication apparatus; The ball valve that is used for the supply of control pressurized air and flow regulation
Be provided with communication apparatus, stabilized voltage supply for video signal transmission in the indoor machine 4;
Communication apparatus comprises for the fiber optic of image signal transmission and optical cable; Fiber optic and optical cable transmission the fiber optic to indoor machine 4 in of video signal in field box 3 restores into video electrical signal to industrial computer 6, finishes the transmission of picture signal.
Because environment is abominable in the continuous casting line workshop, various electromagnetic interference sources are more, so the monofilm optical cable is adopted in the transmission of vision signal, to guarantee the transmission quality of image.
In the industrial computer 6 video image processing system is installed, in order to the video data that gathers is processed and analyzed, and real-time video picture and result (size of defective, Type and distribution etc.) is presented on the display 5.Described result comprises size, Type and distribution of continuous casting steel billet surface imperfection etc.
The hot detecting continuous casting billet surface quality detection method of the present invention, the step of this detection method is as follows:
1) be equipped with in above hot continuous casting steel billet, installing the technical grade video camera video camera protective jacket 1 and in the light source protective jacket 2 of light filling equipment is housed, described light filling equipment is aimed at billet surface, utilize highlighted light source to carry out light filling, when steel billet passes through surveyed area, camera is taken continuously, finish image acquisition, the image of collection as shown in Figures 2 and 3;
2) fiber optic and optical cable transmission the fiber optic to indoor machine 4 in of the picture signal after gathering in field box 3 restores into video electrical signal to industrial computer 6, finishes the transmission of picture signal;
3) 6 pairs of images of described industrial computer carry out the processing of filtering Reduction Analysis, by the texture analysis algorithm billet surface image are processed.When casting billet surface had the crack, as shown in Figure 2, the crack showed as an elongated darker regions in image; When casting billet surface had pit, as shown in Figure 3, described pit showed as the irregular darker regions of a block edge at image.By algorithm image is processed, the image after the processing as shown in Figure 4 and Figure 5, crack and pit in the picture show as white portion, the defective of Fig. 4 corresponding diagram 2 wherein, the defective of Fig. 5 corresponding diagram 3.
4) with step 2) the real-time video picture of transmission and step 3) process after image result be presented on the display (5);
5) when computer processing system found that casting billet surface has defective, the defective of billet surface just can be distinguished by system, and according to travelling speed and the detection time of steel billet, system can determine the position of defective again, and warning device 7 sends sound and light alarm automatically.
The staff receives the report for police service and in time processes afterwards.
In sum, content of the present invention is not limited in the above-described embodiments, and those skilled in the art can propose other embodiment easily according to guiding theory of the present invention, and these embodiments all comprise within the scope of the present invention.
Claims (1)
1. a hot detecting continuous casting billet surface quality detection method is characterized in that, the step of this detection method is as follows:
1) be equipped with in above hot continuous casting steel billet, installing the technical grade video camera video camera protective jacket (1) and in the light source protective jacket (2) of light filling equipment is housed, described light filling equipment is aimed at billet surface, utilize highlighted light source to carry out light filling, when steel billet passes through surveyed area, camera is taken continuously, finishes image acquisition;
2) fiber optic and optical cable transmission the fiber optic to indoor machine (4) in of the picture signal after gathering in field box (3) restores into video electrical signal to industrial computer (6), finishes the transmission of picture signal;
3) described industrial computer (6) carries out the processing of filtering Reduction Analysis to image, by the texture analysis algorithm billet surface image is processed; When casting billet surface had the crack, described crack showed as an elongated darker regions in image; When casting billet surface had pit, described pit showed as the irregular darker regions of a block edge at image; Image after algorithm process, crack and pit show as white portion;
4) with step 2) image result after the real-time video picture of transmission and step 3) are processed is presented on the display (5);
5) when computer processing system found that casting billet surface has defective, the defective of billet surface just can be distinguished by system, and according to travelling speed and the detection time of steel billet, system can determine the position of defective again, and warning device (7) sends sound and light alarm automatically.
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| CN2012105762483A CN103033520A (en) | 2012-12-26 | 2012-12-26 | Detection method for surface quality of hot continuous casting billet |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103645195A (en) * | 2013-11-14 | 2014-03-19 | 无锡港湾网络科技有限公司 | Cold-rolled steel surface detection method based on machine vision |
| CN108747405A (en) * | 2018-08-23 | 2018-11-06 | 江苏森蓝智能系统有限公司 | A kind of copper bar production line by arranging line identification production and processing |
| CN112489025A (en) * | 2020-12-07 | 2021-03-12 | 南京钢铁股份有限公司 | Method for identifying pit defects on surface of continuous casting billet |
| CN112718881A (en) * | 2019-10-28 | 2021-04-30 | 南京智欧智能技术研究院有限公司 | Method and device for detecting surface defects of hot-rolled steel material |
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| GB1323360A (en) * | 1970-11-14 | 1973-07-11 | Schaumburg G | Process and apparatus for the detectability of surface defects in continuously cast products |
| JP2001205327A (en) * | 2000-01-28 | 2001-07-31 | Sumitomo Metal Ind Ltd | Surface property discriminating device |
| CN102608126A (en) * | 2012-02-23 | 2012-07-25 | 中冶连铸技术工程股份有限公司 | On-line detection method and device for surface defects of high-temperature continuously cast bloom |
| CN102827984A (en) * | 2012-09-06 | 2012-12-19 | 天津市三特电子有限公司 | Blast furnace burden granularity video detection device and blast furnace burden granularity video detection method |
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2012
- 2012-12-26 CN CN2012105762483A patent/CN103033520A/en active Pending
Patent Citations (4)
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| GB1323360A (en) * | 1970-11-14 | 1973-07-11 | Schaumburg G | Process and apparatus for the detectability of surface defects in continuously cast products |
| JP2001205327A (en) * | 2000-01-28 | 2001-07-31 | Sumitomo Metal Ind Ltd | Surface property discriminating device |
| CN102608126A (en) * | 2012-02-23 | 2012-07-25 | 中冶连铸技术工程股份有限公司 | On-line detection method and device for surface defects of high-temperature continuously cast bloom |
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Non-Patent Citations (1)
| Title |
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| 魏双盈: "连铸坯表面缺陷在线检测研究", 《武汉理工大学学报》, vol. 31, no. 3, 30 June 2009 (2009-06-30), pages 433 - 436 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103645195A (en) * | 2013-11-14 | 2014-03-19 | 无锡港湾网络科技有限公司 | Cold-rolled steel surface detection method based on machine vision |
| CN108747405A (en) * | 2018-08-23 | 2018-11-06 | 江苏森蓝智能系统有限公司 | A kind of copper bar production line by arranging line identification production and processing |
| CN112718881A (en) * | 2019-10-28 | 2021-04-30 | 南京智欧智能技术研究院有限公司 | Method and device for detecting surface defects of hot-rolled steel material |
| CN112489025A (en) * | 2020-12-07 | 2021-03-12 | 南京钢铁股份有限公司 | Method for identifying pit defects on surface of continuous casting billet |
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Application publication date: 20130410 |